Examples of org.apache.lucene.queries.function.valuesource.OrdFieldSource

Package org.apache.lucene.queries.function.valuesource

Examples of org.apache.lucene.queries.function.valuesource.OrdFieldSource

org.apache.lucene.queries.function.valuesource.OrdFieldSource
Obtains the ordinal of the field value from the default Lucene {@link org.apache.lucene.search.FieldCache} using getStringIndex().
The native lucene index order is used to assign an ordinal value for each field value.
Field values (terms) are lexicographically ordered by unicode value, and numbered starting at 1.
Example:
If there were only three field values: "apple","banana","pear"
then ord("apple")=1, ord("banana")=2, ord("pear")=3
WARNING: ord() depends on the position in an index and can thus change when other documents are inserted or deleted, or if a MultiSearcher is used.
WARNING: as of Solr 1.4, ord() and rord() can cause excess memory use since they must use a FieldCache entry at the top level reader, while sorting and function queries now use entries at the segment level. Hence sorting or using a different function query, in addition to ord()/rord() will double memory use.

  private void doTestRank(String field, boolean inOrder) throws Exception {
    IndexReader r = DirectoryReader.open(dir);
    IndexSearcher s = new IndexSearcher(r);
    ValueSource vs;
    if (inOrder) {
      vs = new OrdFieldSource(field);
    } else {
      vs = new ReverseOrdFieldSource(field);
    }


    Query q = new FunctionQuery(vs);

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  private void doTestExactScore(String field, boolean inOrder) throws Exception {
    IndexReader r = DirectoryReader.open(dir);
    IndexSearcher s = new IndexSearcher(r);
    ValueSource vs;
    if (inOrder) {
      vs = new OrdFieldSource(field);
    } else {
      vs = new ReverseOrdFieldSource(field);
    }
    Query q = new FunctionQuery(vs);
    TopDocs td = s.search(q, null, 1000);

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    r.close();
  }
  
  // LUCENE-1250
  public void testEqualsNull() throws Exception {
    OrdFieldSource ofs = new OrdFieldSource("f");
    assertFalse(ofs.equals(null));
    
    ReverseOrdFieldSource rofs = new ReverseOrdFieldSource("f");
    assertFalse(rofs.equals(null));
  }

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  private void doTestRank(String field, boolean inOrder) throws Exception {
    IndexReader r = DirectoryReader.open(dir);
    IndexSearcher s = newSearcher(r);
    ValueSource vs;
    if (inOrder) {
      vs = new OrdFieldSource(field);
    } else {
      vs = new ReverseOrdFieldSource(field);
    }


    Query q = new FunctionQuery(vs);

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  private void doTestExactScore(String field, boolean inOrder) throws Exception {
    IndexReader r = DirectoryReader.open(dir);
    IndexSearcher s = newSearcher(r);
    ValueSource vs;
    if (inOrder) {
      vs = new OrdFieldSource(field);
    } else {
      vs = new ReverseOrdFieldSource(field);
    }
    Query q = new FunctionQuery(vs);
    TopDocs td = s.search(q, null, 1000);

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    r.close();
  }
  
  // LUCENE-1250
  public void testEqualsNull() throws Exception {
    OrdFieldSource ofs = new OrdFieldSource("f");
    assertFalse(ofs.equals(null));
    
    ReverseOrdFieldSource rofs = new ReverseOrdFieldSource("f");
    assertFalse(rofs.equals(null));
  }

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Related Classes of org.apache.lucene.queries.function.valuesource.OrdFieldSource

org.apache.lucene.index.AtomicReader

org.apache.lucene.index.IndexReader

org.apache.lucene.index.SlowCompositeReaderWrapper

org.apache.lucene.index.SortedDocValues

org.apache.lucene.queries.function.docvalues.IntDocValues

org.apache.lucene.queries.function.TestOrdValues

org.apache.lucene.util.mutable.MutableValueInt

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